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r.observe(a,{attributes:!0,childList:!0,characterData:!0,subtree:!0})));this._monitoringDocuments.push(a);this._monitoringUnsubscribes.push(function(){var b=a.defaultView;b&&(e&&b.clearInterval(e),w(b,"resize",d,!0));w(a,"scroll",d,!0);r&&r.disconnect()});a!=(this.root&&this.root.ownerDocument||h)&&(b=g(a))&&this._monitorIntersections(b.ownerDocument)}};c.prototype._unmonitorIntersections=function(a){var b=this._monitoringDocuments.indexOf(a);if(-1!=b){var d=this.root&&this.root.ownerDocument||h;
if(!this._observationTargets.some(function(b){b=b.element.ownerDocument;if(b==a)return!0;for(;b&&b!=d;)if(b=(b=g(b))&&b.ownerDocument,b==a)return!0;return!1})){var e=this._monitoringUnsubscribes[b];this._monitoringDocuments.splice(b,1);this._monitoringUnsubscribes.splice(b,1);e();a!=d&&(b=g(a))&&this._unmonitorIntersections(b.ownerDocument)}}};c.prototype._unmonitorAllIntersections=function(){var a=this._monitoringUnsubscribes.slice(0);this._monitoringDocuments.length=0;for(var b=this._monitoringUnsubscribes.length=
0;b<a.length;b++)a[b]()};c.prototype._checkForIntersections=function(){if(this.root||!m||n){var a=this._rootIsInDom(),b=a?this._getRootRect():l();this._observationTargets.forEach(function(d){var e=d.element,c=p(e),g=this._rootContainsTarget(e),t=d.entry,h=a&&g&&this._computeTargetAndRootIntersection(e,c,b);d=d.entry=new f({time:window.performance&&performance.now&&performance.now(),target:e,boundingClientRect:c,rootBounds:m&&!this.root?null:b,intersectionRect:h});t?a&&g?this._hasCrossedThreshold(t,
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p(this.root);else{a=h.documentElement;var b=h.body;a={top:0,left:0,right:a.clientWidth||b.clientWidth,width:a.clientWidth||b.clientWidth,bottom:a.clientHeight||b.clientHeight,height:a.clientHeight||b.clientHeight}}return this._expandRectByRootMargin(a)};c.prototype._expandRectByRootMargin=function(a){var b=this._rootMarginValues.map(function(b,c){return"px"==b.unit?b.value:b.value*(c%2?a.width:a.height)/100});b={top:a.top-b[0],right:a.right+b[1],bottom:a.bottom+b[2],left:a.left-b[3]};b.width=b.right-
b.left;b.height=b.bottom-b.top;return b};c.prototype._hasCrossedThreshold=function(a,b){a=a&&a.isIntersecting?a.intersectionRatio||0:-1;b=b.isIntersecting?b.intersectionRatio||0:-1;if(a!==b)for(var c=0;c<this.thresholds.length;c++){var e=this.thresholds[c];if(e==a||e==b||e<a!==e<b)return!0}};c.prototype._rootIsInDom=function(){return!this.root||y(h,this.root)};c.prototype._rootContainsTarget=function(a){return y(this.root||h,a)&&(!this.root||this.root.ownerDocument==a.ownerDocument)};c.prototype._registerInstance=
function(){0>k.indexOf(this)&&k.push(this)};c.prototype._unregisterInstance=function(){var a=k.indexOf(this);-1!=a&&k.splice(a,1)};window.IntersectionObserver=c;window.IntersectionObserverEntry=f}})();Number.isNaN=Number.isNaN||function(g){return"number"===typeof g&&isNaN(g)};